A Researcher Calculates a Mean from a Sample of 23

question 94

Multiple Choice

A researcher calculates a mean from a sample of 23 people. In analyzing her data, she states the following hypotheses: H₀: μ = 25 and H₁: μ ≠ 25. For α = .05, which is an appropriate critical value?

• A) 1.717
• B) 2.074
• C) 2.069
• D) 2.064

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Definitions:

Sympatric Speciation

Speciation pattern in which speciation occurs within a population, in the absence of a physical barrier to gene flow.

Physical Barrier

Any natural or artificial structure that blocks or limits movement, spread, or access of organisms or materials.

Polyploidy

The condition of having more than two complete sets of chromosomes in an organism, common in plants and some animal species.

Sexual Dimorphism

The noticeable difference in appearance between males and females of the same species, beyond just the reproductive organs.